Adjustable mount for auxiliary gun sight

ABSTRACT

A sight mounting pad is pivotally mounted on the spherical heads of a pair of longitudinally spaced bolts and is secured to a supporting member by four machine bolts two of which are mounted through the mounting pad and supporting member on opposite sides of each of the spherical headed bolts. The spherical headed bolts are adjusted vertically to level the mounting pad longitudinally and by loosening two of the machine bolts on one side of the spherical headed bolts, and tightening the two machine bolts on the other side thereof, the mounting pad is levelled transversely.

United States Patent Jones 51 June 27, 1972 [54] ADJUSTABLE MOUNT FORAUXILIARY GUN SIGHT [7 2] inventor: Frank D. Jones, Moline, ill.

[73] Assignee: The United States of America as represented by theSecretary of the Army [22] Filed: Dec. 8, 1970 [21] Appl.No.: 96,209

52 us. c1. ..248/226 R, 33/56 R 51 Int. Cl lg 1/38 581 Field of Search..248/226 R, 205 R, 180, 184;

33/49 R, 49 B, so R, 50 B, 56 R [56] References Cited UNITED STATESPATENTS 2,044,355 6/1936 Lundgren ..33/56 R 2,117,634 5/1938 Smith2,653,386 9/1953 Winton ..33/50RX 3,134,174 5/1964 Gagnier ..33/56RX3,177,587 4/1965 Hart ..33/50R 3,559,940 2/1971 Kruzell ..248/226RPrimary Examiner-J. Franklin Foss Attorney-Harry M. Saragovitz, EdwardJ. Kelly, Herbert Berl and Albert E. Arnold, Jr.

[57] ABSTRACT A sight mounting pad is pivotally mounted on the sphericalheads of a pair of longitudinally spaced bolts and is secured to asupporting member by four machine bolts two of which are mounted throughthe mounting pad and supporting member on opposite sides of each of thespherical headed bolts. The spherical headed bolts are adjustedvertically to level the mounting pad longitudinally and by loosening twoof the machine bolts on one side of the spherical headed bolts, andtightening the two machine bolts on the other side thereof, the mountingpad is levelled transversely.

3 Claims, 3 Drawing Figures ADJUSTABLE MOUNT FOR AUXILIARY GUN SIGHTBACKGROUND OF THE INVENTION This invention relates to sights andpertains more particularly to means for adjustably mounting a sight to asupporting gun. A problem has developed in the matter of mounting anauxiliary sight to the gun in a weapon system so as to be in alignmentwith the primary sight system thereof where the member which supportsthe primary sight is a roughly surfaced casting.

SUMMARY OF THE INVENTION The problem has been successfully overcome withthe present invention whereby the mounting pad for the auxiliary sightis located on the supporting member relative to the bars which index theprimary sight and are mounted on a pair of spherical headed bolts forpivotal displacement. Four machine bolts two of which are mountedthrough the mounting pads and supporting member on opposite sides ofeach of the spherical headed bolts secure the mounting pads thereto. Thespherical headed bolts are screwed up and down by a screw driver tolevel the mounting pads longitudinally and by loosening two of themachine bolts on one side of the spherical headed bolts and tighteningthose on the other side thereof the mounting pad is leveledtransversely.

BRIEFDESCRIPTION OF THE DRAWING FIG. 1 is a fragmentary top view of asight mounting pad assembled to the sight support casting;

FIG. 2 is a cross-sectional view taken along line 2--2 of FIG. 1; and

FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1.

DESCRIPTION OF A PREFERRED EMBODIMENT Shown in the drawing is a sightsupport casting 12 for weapons systems such as those that include aVulcan gun, which casting is adapted for assembly to the gun so as tosupport a lead computing sight (not shown). Casting 12 comprises a pairof longitudinally spaced and vertically disposed flanges 14 which areintegrally connected along the top and at opposite ends by a web 16.Provided in each of the flanges 14 is a recess 20 which receives thelead computing sight (not shown) and shown extending between the flangesis one of two bars 22 for supporting and locating the lead computingsight. Bars 22 are of square configuration in cross-section and, whencasting 12 is assembled to the supporting gun, they are located parallelto the bore axes of the gun barrels so that the lead computing sight(not shown) is aligned therewith.

When an auxiliary sight is to be added to the weapon system, means mustbe provided, because of the surface roughness of casting 12, formounting it thereto so that is is firmly seated and so that it can beadjusted into alignment with the line of sight of the gun barrels. Thisis accomplished by mounting as hereinafter described to the top side ofweb 16 a clamping plate 24 with a front backplate 26 and a rearbackplate 28 located under the web opposite the front and rear ends ofthe clamping plate respectively.

Located symmetrically in opposite ends of clamping plates 24, so as toextend downwardly and integrally therefrom, is a stud 32. Each of thestuds 32 is provided therethrough with a threaded axial bore 36 whichextends through clamping plate 24 and each of the studs is threadedexternally at 34. Studs 32 are receivable by mating holes 37 located inweb 16 equidistant from bar 22 so that clamping plate 24 is therebylocated parallel thereto. Studs 32 also extend through mating orifices38 in the respective front backplate 26 and rear backplate 28 and a nut40 engages each of the external threads 34 so that when tightenedagainst the respective front and rear backplate clamping plate 24 issecured against displacement to web 16, as shown in FIGS. 2 and 3.

A bolt 42 having a spherical head 44 with a screw driver slot 46 thereinis threaded downwardly into each of the bores 36 so that a portion 48 ofthe bolt extends from the bottom end of the respective stud 32. Alocking nut 49 is threaded onto extending portion 48 of each of thebolts 42 and tightened against the end of the associated stud 32 tosecure the bolt in a vertically adjusted position relative thereto.Heads 44, which are located above the top surface of the clamping plates24, provide bearings for the pivotal displacement of a mounting pad 50,as hereinafter described. Mounting pad 50 is secured to clamping plate24 by means of four machine bolts 52 two of which extend verticallythrough the mounting pad, clamping plate 24, web 16 and either frontbackplate 26 or rear backplate 28 on opposite sides of each of the studs32. Nuts 53 are threaded on the end of each of the machine bolts 52 tosecure mounting pads to clamping plates 24 when tightened. Heads 44 arereceived by mating spherical recesses 54 formed in the bottom ofmounting pads 50 to provide pivotal seats therefor and apertures 56,communicating with recesses 54, permit entry of a screw driver thereintofor engagement with screw driver slots 46 in the heads for turning bolts42 to raise or lower the heads relative to clamping plates 24. Suitablemeans, as bracket 58, are provided on mountingpad 56 for mounting anauxiliary sight thereto. I

To level mounting pad 50 longitudinally, nuts 53 on bolts 52 and lockingnuts 49 on bolts 42 are loosened and then bolts 42 can be screwed up ordown by a screw driver or other suitable tool inserted through apertures56 for engagement with screw driver slots 46 and heads 44. When nuts 49are retightened, bolts 42 and heads 44 thereon are secured in theiradjusted vertical positions and when nuts 53 are retightened mountingpad 50 is secured in its adjusted position. Mounting pad 50 is leveledtransversely by loosening nuts 53 on those bolts 52 which are positionedonjone side of studs 32 and tightening the nuts on those bolts which arelocated on the opposite side of the studs.

I wishit to be understood that I do not desire to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

Iclaim:

1. The combination comprising a gun sight supporting member, a clampingplate, a pair of longitudinally spaced bolts threadingly engaged withsaid clamping plate for vertical adjustment relative thereto, each ofsaid bolts including a spherical head and means for vertical adjustmentthereof, a mounting pad including a pair of spherical recesses forreceiving said heads in bearing contact to pivotally mount said mountingpad relative to said clamping plate, means for securing said mountingpad and said clamping plate to said sight supporting member andefiecting transverse leveling of said mounting pad relative theretoabout said heads, and an aperture communicating with each of saidrecesses to pennit access to said heads for vertical adjustment thereofto level said mounting pad longitudinally relative to said sightsupporting member.

2. The combination as defined in claim I wherein said clamping platecomprises a pair of studs extending therefrom through mau'ng holeslocated in said sight supporting member equidistant from a gun barreloriented supporting bar therein, a threaded axial bore through each ofsaid studs and said clamping bar for threadingly receiving one of saidbolts, and a nut threadingly mounted on each of said studs so as tosecure said clamping plate to said sight supporting member whentightened.

3. The combination as defined in claim 1 wherein said means comprisesfour machine bolts with engaging nuts extending through cooperatingholes in said mounting pad, said sight supporting member and saidclamping plate for securing said mounting pad thereto responsive totightening of said nuts on said machine bolts, two of said machine boltsbeing located on opposite sides of each of said studs to effecttransverse leveling of said mounting pad when said machine bolts arevertically adjusted.

1. The combination comprising a gun sight supporting member, a clampingplate, a pair of longitudinally spaced bolts threadingly engaged withsaid clamping plate for vertical adjustment relative thereto, each ofsaid bolts including a spherical head and means for vertical adjustmentthereof, a mounting pad including a pair of spherical recesses forreceiving said heads in bearing contact to pivotally mount said mountingpad relative to said clamping plate, means for securing said mountingpad and said clamping plate to said sight supporting member andeffecting transverse leveling of said mounting pad relative theretoabout said heads, and an aperture communicating with each of saidrecesses to permit access to said heads for vertIcal adjustment thereofto level said mounting pad longitudinally relative to said sightsupporting member.
 2. The combination as defined in claim 1 wherein saidclamping plate comprises a pair of studs extending therefrom throughmating holes located in said sight supporting member equidistant from agun barrel oriented supporting bar therein, a threaded axial borethrough each of said studs and said clamping bar for threadinglyreceiving one of said bolts, and a nut threadingly mounted on each ofsaid studs so as to secure said clamping plate to said sight supportingmember when tightened.
 3. The combination as defined in claim 1 whereinsaid means comprises four machine bolts with engaging nuts extendingthrough cooperating holes in said mounting pad, said sight supportingmember and said clamping plate for securing said mounting pad theretoresponsive to tightening of said nuts on said machine bolts, two of saidmachine bolts being located on opposite sides of each of said studs toeffect transverse leveling of said mounting pad when said machine boltsare vertically adjusted.